Nirmion
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Developer & Data

URL Decoder

Decode percent-encoded UTF-8 in one URL component and report malformed sequences.

  1. 01Runs in this browser
  2. 02Limits are explicit
  3. 03Copy or download output

Step 1

Set up the source

Paste a percent-encoded component. The page does not open, request, or judge the resulting URL.

Confirming the published workspace...

No black box

How this tool handles the input

The browser applies decodeURIComponent rules and rejects incomplete escapes or byte sequences that are not valid UTF-8.

Before you start

What you need

One percent-encoded URL component.

What you get

What the page gives back

Decoded Unicode text ready to inspect or copy.

Keep in mind

Use the result responsibly

Decoding can reveal markup or control characters. Treat output as untrusted text and never inject it directly into HTML.

Practical uses

Where this tool earns its place

  1. Read an encoded query parameter.
  2. Inspect a path segment copied from logs.
  3. Confirm whether percent escapes are valid.

Verified data boundary

Source text stays on this page.

The published contract marks these tools as client-only processing. Nirmion uses the API only to confirm that this workspace is enabled in MySQL; source values and results are not sent to Flask.

Keep working

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